The ray tracing built into Cryengine 5.5 is hardware and API agnostic. Meaning, it doesn't require Microsoft DXR to work and by extension then the RTX cores on NVidia cards. This can bring real time ray tracing to the Vulkan API as well as NVidia and AMD hardware under either Vulkan or DX12.
https://www.cryengine.com/news/crytek-releases-neon-noir-a-real-time-ray-tracing-demonstration-for-c...